react-dnd/lib/createTargetConnector.js

Drag and Drop for React

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var wrapConnectorHooks_1 = __importDefault(require("./wrapConnectorHooks"));
var shallowequal_1 = __importDefault(require("shallowequal"));
function createTargetConnector(backend) {
    var currentHandlerId;
    var currentDropTargetNode;
    var currentDropTargetOptions;
    var disconnectCurrentDropTarget;
    function reconnectDropTarget() {
        if (disconnectCurrentDropTarget) {
            disconnectCurrentDropTarget();
            disconnectCurrentDropTarget = undefined;
        }
        if (currentHandlerId && currentDropTargetNode) {
            disconnectCurrentDropTarget = backend.connectDropTarget(currentHandlerId, currentDropTargetNode, currentDropTargetOptions);
        }
    }
    function receiveHandlerId(handlerId) {
        if (handlerId === currentHandlerId) {
            return;
        }
        currentHandlerId = handlerId;
        reconnectDropTarget();
    }
    var hooks = wrapConnectorHooks_1.default({
        dropTarget: function connectDropTarget(node, options) {
            if (node === currentDropTargetNode &&
                shallowequal_1.default(options, currentDropTargetOptions)) {
                return;
            }
            currentDropTargetNode = node;
            currentDropTargetOptions = options;
            reconnectDropTarget();
        },
    });
    return {
        receiveHandlerId: receiveHandlerId,
        hooks: hooks,
    };
}
exports.default = createTargetConnector;
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